Design of a low-cost and high-performance DC linear power supply using in electronic experiment

In this paper, the design of a DC linear regulator power supply as one of the experimental supply with constant voltage output and adjustable voltage output with digital display is presented. Among it, the constant voltage output supply is designed by low-cost, high-precision integrated voltage regulator chips and commonly discrete components; and the adjustable voltage output with digital display is mainly designed by the microcontroller of STC12C2052AD. The design of power supply has many advantages, such as: low-cost, high performance, high stability, simple circuits, easy to operate and so on. By the actual experimental test, the power supply can meet the majority basic requirements of the electronic and electrical experiments in daily. It is not only a good power supply to be picked for the students and the electronic enthusiasts, but also can be facilitated to make by self.